compositor-x11: Handle keyboard focus correctly so we avoid stuck modifiers

wayland/wayland-util.c

@@ -113,3 +113,11 @@ wl_array_add(struct wl_array *array, int size)
 
 	return p;
 }
+
+WL_EXPORT void
+wl_array_copy(struct wl_array *array, struct wl_array *source)
+{
+	array->size = 0;
+	wl_array_add(array, source->size);
+	memcpy(array->data, source->data, source->size);
+}

wayland/wayland-util.h

@@ -148,6 +148,7 @@ struct wl_array {
 void wl_array_init(struct wl_array *array);
 void wl_array_release(struct wl_array *array);
 void *wl_array_add(struct wl_array *array, int size);
+void wl_array_copy(struct wl_array *array, struct wl_array *source);
 
 #ifdef  __cplusplus
 }